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I was thinking about terminator 1000. "That's it you're dead!"

So many capacitors, I am definitely not looking forward to it. Thank you for sharing! 73, KD2TDE

That's an interesting problem. I recently got one of these (mine does not have an A at the end) and the positive half of the sine wave seems to be clipped a bit. I am going to look into it so I appreciate you recording this video!

"Sounds of Mungo Jerry in the background, very relaxing." You are droll! Amazing restoration, great creativity.

Wo bekommt man denn eine Ersatzbatterie für das PLB1 her?

Good job. Enjoyed the 260 cap tests.

After replacing the battery, you should use the test procedure to make sure everything is ok. One more question: where to find the replacement gasket?

Great work Stefan. I did not know the probe loop trick so thank you. From hot Tempe, AZ USA

This was drilled into us at Motorola and Kenwood to RTFM and understanding how the radio works and how to enter proper alignment modes. I went to another shop after the one I worked at closed down and was appalled at the bench tech as to how he aligned the Motorola Maxtrac and Radius line of radios that were popular some 20 plus years ago! Instead of using the computer with alignment software to set up the radio after a major repair he would just twiddle the caps and coils until the radio worked. Now the radio would come back time and time again for alignment issues. I was the low ball man on the bottom of the totem pole so I kept to myself. This was not the way to align these radios! Software controlled radios are a different beast compared to legacy Motorola and GE radios that had zero microprocessors in them. Funny I had fifteen years experience on these micro controlled radios and could have solved the problem in about an hour and a half of realignment by the book.

Thank you for the wonderful advice. I almost switched the speakers to my primary pair after running the hot amp for 5 days, few hours each day. Didnt realise on the lack of internal protection system eventhough i opened the cover to visually inspect the parts. What a great series, enjoyed every second of it. Thank you for taking the initiative and putting in much effort to share it with everyone. You probably saved my speakers that I intended to run the amp with.

Hi Stefan, excellent result after an arduous search for the root problem. I also have a Yaesu FT 857, I opened it and removed it (the conductive heatsink) Greetings from Chile CA5JXT Jaime 73.

Something about KENWOOD that just gets my attention. Is it live, or is it Memorex? I mean KENWOOD!

Contrary to the manual can be best, I agree with vertical alignment. Also the accuracy comments in the manual are stupid. It's more accurate in the first half of the scale, not over the whole scale. Manual says use the most scale you can, if you check it, that's wrong so you are correct to think and not blindly follow the manual. Weather stripping for the battery it GREAT. Keep up the good work.

Great videos Stefan, from Tempe AZ

Hi Stefan. Pardon me for saying you look a little tired after this fix. Thing is, this is the true satisfaction of using you educated skills to repair a broken instrument. Take a break now, collect your wit, and forget about the battle for awhile. Cheers from West USA.

thanks for sharing this very valuable video I can use it for my R4B

Manmanman Stefan, da hat man Dir aber wirklich ein faules Ei ins Nest gelegt ! Ich bewundere Deine Ausdauer, manch einer hätte das Gerät schon längst über den Jordan geworfen und wär zum nächsten Funkhändler gefahren, um sich was schickes neues zu kaufen. Die Herausforderung, das Ding zum Laufen zu bringen zeichnet Dich aber als wahren Funkamateur aus. Eigentlich hätte man das Gerät einem angehenden Funkamateur in die Hand drücken müssen, um sich im Technikverständnis zu beweisen. Es gibt kaum ein besseres Anschauungsobjekt wie diesen faulty TXRX der zeigt, was für HF- Fallstricke einen überraschen können. Drück Dir die Daumen, dass der FT221 Reparaturbericht im einstelligen Bereich bleibt (obwohl es ja immer spannend ist, Dir bei der Arbeit zuzuschauen 😉) 73, bleib gesund von DL1LAJ Andreas

What an unusual problem, transformer failure is way down my list of suspects. Guess you got lucky (???) I have not seen that glue used on transformer windings but have seen plenty of damaged components and PCBs. Hopefully the alignment resolves all PLL issues - looking forward to part 9 and beyond 😀. Regards, David

that corrosive glue killed more transceivers than operator error. The solvent dries out, becomes porous, absorbs moisture, and eats away the insulations, even the legs of the components. It's a well known problem in Yaesu and Kenwood transceivers made in the 70-es and 80-es.

Thank you for a great video. I follow.

Good morning Stefan, I live in London, I have a Yaesu FT-101Z, would | be able to send it there for a complete inspection and alignment...

Good morning Stefan, I live in London, I have a Yaesu FT-101Z, would | be able to send it there for a complete inspection and alignment...

Hi good afternoon, :This is KC2DPY. I have the same tuner but when my radio has the preamp on its do not tune,any suggestions.

Hello Stefan, I can't wait to see your discrete version of the uA703. Mit freundlichen grüßen

Hello Stefan, I sent you an e-mail with a suggestion! 73, Michele IZ2EAS

Hopefully this will become a "Independence Day" movie equivalent with a little more troubleshooting and work! 73 - Dino KLØS

Great to see inside. I wonder how much knowledge the authorised batrery changers have and how much care they take in the procedure? In the uk at least its relatively recent that land use was licenced for such devices. Reading the opinions of prospective users or even rescue personnel is somewhat revealing. Ignorance is a remarkable thing. Why do replacmet batteries cost almost as much as a new device ? Even sealed bolt on batteries that are user changable. I think i'd rather have one of these that i had check myself than not have one at all for want of not being able to afford one. It is also legal to use unlike keying up on an aircraft frequency to get help in a remote catastrophe, or whatever other solution you can think of. Also I'm not going to accept some nonsense of.. if you can't afford £10/£100/£1000 per month for the subscription you shouldn't be doing it. Sarsat is global and open for any register user. It saves rescue teams hours or days and is surely the most accessible and efficient distress system going for remote and inaccessible areas. Why is the cost of safety so high? If you need to say because accidents cost more you clearly don't get the premise of a PLB. Every year we are battered with news reports of lost(missing) hikers in Scotland. Deliberate generation of a public hate for people "having to be rescued that shouldn't be there" What a difference it would make if these were accepted as commonplace here. It reads as though responsibility is not permitted here. The government and your peers don't allow it. You couldn't be responsible for not activating the life at risk device at any other time, and you certainly couldn't be responsible for changing the battery in such a thing. A great video. Informative. Interesting. Contentious!

Hello Stefan, I se you have a HP counter is it a 5340A, i have a 5340A working so if you need to service your sometime you know where another is, if you need any measured values.

Hallo, The Japanese modern substitute for uA703 is TA7060P but in SIL package in my country "IRAN" is very chip. good luck sir.

you can use an MC1350 to amplify that signal, in case of absolute necessity. It has the advantage that its gain can be set with an external resistor, and the IC is really cheap.

Hallo Stefan, den LM703 habe ich damals nach dem Vorschlag von DL4CS nachgebaut. Aber sicher hast Du seinen Vorschlag schon beim Googeln gefunden. 73 Bernd

A very funny movie to watch, but not so funny to live! I checked my bench stock, but no 703s to be found. You might look at the TI THS4130 or THS4131 as a substitute (with a small adapter board), around $8 US from Mouser or at your favorite supplier. Regards, David

Maybe you can buy it from svebry electronics in sweden only 20sek

Deutschland schafft sich ab.......... Schwätz DEUTSCH !!!

Is that a switching power supply?

At this point japanese consumer grade receivers surpas american professional grade receivers in terms of quality and longevity. 😂

Hoe about putting a proper transformer with diodebridge stabilizer transistor and big elco's and throw that switching source in the bin instead of servicing it

Switching power source 🤢

Never ending work is never easy. 😉

I noticed it only had 2 pins on the power plug in the 1st video and wasnt impressed, Ive never seen that before, I think I would change that. Very good thorough analysis. I have to say in my experience those old Philips caps in the smaller sizes are generally bad but you are quite right its getting harder to get axial replacements.

You're awesome, Stefan.

Manmanman, nimmt ja kein Ende mit dem FT221, Stefan. Man könnte meinen, FT steht für Fehlerteufel ;-) Zum Glück sind die Bauteile nicht noch mit irgendwelchen Klebern befestigt, der sie irgendwann mal durch Zersetzen angreift. 73, beste Gesundheit von Andreas, DL1LAJ

I wonder if over time with the output set so high that the diode was stressed providing the ALC and that's why it failed, although that theory is a stretch. OR it was just the diode's time to go! ;-) Look forward to Part 7, have a great weekend Stefan! 73 - Dino KLØS

Hey Stefan, I see that the saga continues. It's amazing how many little things you can find wrong with a rig like that. Looking forward to your next video. Stay healthy my friend.

It's crazy how many errors accumulate over time. In addition to all the age-related errors in the components, there are also those of the golden screwdriver heroes and "ingenious" modifiers ;-) But you exposes them all.👍 It was very interesting to watch your work. mny tnx es 73 de Bernd

Nice Rig Stefan, when i was getting my ham license early 80´s the Yeasu FT-101ZD was introduced LED frequency was very cool back then. Bye the way all mail i tried to send you bunced back after a week non deliverable. 🙃

Thanks very much. You helped me out quite a bit!⭐

Hallo Stefan, danke für dieses Video, man findet leider nicht so viel über dieses Gerät.

Thankyou very much Stefan. I see you went through much pain to achieve the final result. I know this pain working on older test equipment. I am once again a FT221R owner (for fun on 2m like old days...). Thankyou for sharing your hard won efforts. Excellent video's...73 de M0BTZ

Hi Stefan, you amaze me with your tenacity in tracking down the problem. Great job!!!